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A DIETARY CHOLINE REQUIREMENT FOR EGG PRODUCTION IN DROSOPHILA MELANOGASTER

Summary.: Adult Drosophila melanogaster require dietary choline for oogenesis. Early symptoms of choline starvation are a decline in egg production and egg hatchability followed by oviposition of malformed eggs. Choline-starved females can store viable spermatozoa. Sterility due to choline starvation can be corrected by choline administration. Females fed DL-carnitine in place of choline are fertile but produce fewer eggs with a lower hatchability than when choline is fed.